If you think about most of your runs, you do a warmup, you do the body of the workout, and then you do a cool down.
One thing that is interesting is I have recently noticed a number of runners who have gotten injured by doing runs where they're finishing on the hardest part of their run.
That can put you at risk of an over-training injury.
Today on the Doc On the Run Podcast, we're talking about why you should put the trouble in the middle of the run.